When you look at today’s older Americans, you are in large part looking at the legacy of an economy that is no more. Many workers used to have defined-benefit retirement plans, plans in which their employers guaranteed a steady income after retirement. And a fair number of seniors (like my father, until he passed away a few months ago) are still collecting benefits from such plans.

Today, however, workers who have any retirement plan at all generally have defined-contribution plans — basically, 401(k)’s — in which employers put money into a tax-sheltered account that’s supposed to end up big enough to retire on. The trouble is that at this point it’s clear that the shift to 401(k)’s was a gigantic failure. Employers took advantage of the switch to surreptitiously cut benefits; investment returns have been far lower than workers were told to expect; and, to be fair, many people haven’t managed their money wisely.

As a result, we’re looking at a looming retirement crisis, with tens of millions of Americans facing a sharp decline in living standards at the end of their working lives. For many, the only thing protecting them from abject penury will be Social Security. Aren’t you glad we didn’t privatize the program?

So there’s a strong case for expanding, not contracting, Social Security. Yes, this would cost money, and it would require additional taxes — a suggestion that will horrify the fiscal scolds, who have been insisting that if we raise taxes at all, the proceeds must go to deficit reduction, not to making our lives better. But the fiscal scolds have been wrong about everything, and it’s time to start thinking outside their box.